Hypodermic syringe.



E. LILLY.

HYPODERMIC SYRINGE.

APPLICATION FILED MAR. n. 1915.

Patented Mar. 7,1915.

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To all whom it may concern:

Be it known that I, ELI LILLY, a citizen of the United States, residing at Indianapolis, Marion county, and Stateof Indiana, have invented and discoveredce rtain new and useful Improvements in Hypodermic Syringes, of which the following is a specification.

My invention relates'to hypodermic syringes and its object is to provide meanswhereby a movable closure whichis provided between the liquid containing body and the needle may be quickly and readily released to enable the immediate use of the syringe, such means being especially adapted to cooperate with a'liquid-containing body and a closure both made of glass or other aseptic and chemically resistant material, and the invention particularly aims to utilize the ordinary needle stylus as a means for retaining and for releasing the movable closure. T

With these objects and others in view, my

. invention is embodied in preferable form in the device hereinafter described and illustrated in the accompanying drawings.

In these drawings Figure 1 is a longitudinal sectional view of a syringe embodying -my invention, Fig. 2 an enlarged sectional view thereof, and Fig. 3 a cross section on line 3--3 of Fig. 2'.

Referring to' the drawings, 1 is a liquid containing barrel made of glass was to be aseptic and incapable of being-aifected chemically and adapted to receive and hold a charge of medicinal liquid to be hypodermically injected.

2 is a glass plunger mounted within the .barrel 1 and adapted to be reciprocated to force the liquid from the barrel. One end of thebarrel terminates'in a reduced neck ortion 3 having an outlet passageway leading from the interiorof the barrel. Fitting over this neck is a hollow cylindrical shell 4, preferably of metal, and adapted to be secured upon the neck by cement or other suit able means. The shell carries a hollow The shell is longer ably tapered in order to limit the projection of the shell upon the same so that the shell extends some distance beyond the outer end of the neck, providing a hollow chamber 6. The outer end of the shell is closed by a of the barrel by the plunger into the chamhead 7 through which is formed an outlet Specification of Letters 1atent. Application filed March 11,1915. Serial No. 18,619.

Patented Mar.'7, 1916.

passageway with which passageway commumcate radial-grooves .8 formed in the head; This headis adapted jtoproyide a seat for a movableclosure member 9 which is also made of glassv or other ase tic material and chemically resistant an which is adapted to normally close the otherend'of the opening in the neck 3. In order to hold shown, is formed as a continuation of a pli-- able wire 11 of small diameter which is in-. serted through the needle at the time of assemblage of the parts and is adapted to be pulled through the needle by the operator before use of the syringe in order to-clea'r' the needle of any articles that might have collected therein. his wire is known in the art as stylus.- I In assembling the device, the stylus is inserted through the passageway-in the shell 4 and through the needle so as to project beyond the piercing end of the latter, the spring at endof said stylus being seated in the chamber 6 against the head. The plunger is then inserted in the barrel and the liquid charge supplied to the latter. The glass closure member is then inserted in the chamber 6 and then the shell is forced upon closure member tightly into the outlet opening in the neck of the barrel, thus closing the latter against the escape of liquid. When it is desired to use the syringe, it is merely necessary for the operator .to pull the stylus through the needle as iscustomarily done, whereupon the spring'being forced against 'the' head of the shell 4 will be untwi'sted owing to the pliability of the metal composing the stylus and the latter may be readily withdrawn. As the spring isthus released from pressure against the closure member,

said member is free to move in the chamber 1 away from the end of the liquid containing barrel and the liquid can then be forced out her and around the closure member through the radial grooves and out through the passageway leading from the shell and into the needle.

In the preferred construction illustrated in the drawings, the glass closure member 9 is shown as substantially eg -shaped, with a pointed end which is adapted to enter the lower end of the neck of the barrel in order that a close fit may be obtained, but thismember may be made of other forms, if desired.

With the above construction, it will be seen that the only parts of the syringe that are in contact with the liquid before use are the liquid holding barrel, the piston and the closure member which are all made of glass,

thus preventing contamination of'the me-- containing barrel formed with imperforate sides and'of aseptic and chemically resistant material having an outlet, a plunger of aseptic and chemically resistant barrel, a hollow needle carried by the barrel, a closure member of aseptic and chemically resistant material between the needle and barrel outlet and a spring. for pressing said izlpsure member. to its seat against said out- 2. A hypodermic syringe having a single barrel formed of imperforate walls with openings only in its opposite ends, a plunger mounted in said barrel by being inserted through its outer end, a movable closure member mounted over the discharge orifice in said barrel, a hollow needle mounted around said discharge orifice, the base of said hollow needle being formed with a chamber adapted to provide for the movement of said closure member, and a spring interposed bematerial in said close the said outlet and a spring in saidshell bearing against said member.

4. A hypodermic syringe having a barrel,

a plunger, a hollow needle, a movable closure member for said barrel, means providing a chamber in which said member 1s mounted, a wire of pliable metal extending through the needle and having a spring formed at the inner end thereof, said spring being seated in said chamber and bearing against said member and means against which said spring is forced to untwist the same when the wire is pulled through the needle.

5. A hypodermic syringe having a barrel provided with a discharge orifice in one end and a plunger receiving orifice in its other end, a plunger therein, a hollow needle 7 mounted around said discharge orifice, and

secured to said barrel, a movable closure member mounted to seat in the discharge orifice of said barrel, a stylus passing through said hollow needle and formed with a spring on its inner end, which spring is interposed between said closure member and the inner end of said hollow needle, whereby said closure member is normally held seated on the discharge orifice of said barrel, substantially as set forth.

In witness whereof, I have 'hereunto'set my hand and seal at Indianapolis, Indiana, this twentieth day of February A. 1). nineteen hundred and fifteen.

U ELI LILLY. [r.. s.]' Witnesses:

A. C. Bron,

H. P. Doom'rrnn. 

